Earth, Planets and Space

, Volume 54, Issue 3, pp 303–325 | Cite as

Mafic-felsic magma interaction at Satsuma-Iwojima volcano, Japan: Evidence from mafic inclusions in rhyolites

  • Genji Saito
  • James A. Stimac
  • Yoshihisa Kawanabe
  • Fraser Goff
Open Access


Geochemical and petrographic studies of the rhyolites and mafic inclusions from Satsuma-Iwojima volcano were carried out in order to investigate evolution of a silicic, bimodal magma system during the post-caldera stage. Abundant mafic inclusions, which are fine-grained with vesicles in their cores, are present in the Showa-Iwojima rhyolitic lava. Inclusions with similar textures are found in Iwodake volcanic bombs but are less common than in the Showa-Iwojima lava. The major and trace element compositions of the inclusions plot along mixing lines connecting the host rhyolites with spatially and temporally associated basaltic to basaltic andesite magmas. Plagioclase phenocrysts in the inclusions have a large variation in core compositions (An42 to An96), and exhibit various zoning profiles and reaction textures, indicating they coexisted with melts ranging from basaltic to rhyolitic composition. Pyroxenes also exhibit a wide range in composition and a variety of zoning patterns consistent with multiple sources. These results suggest that a stratified magma chamber exists beneath the volcano, consisting of a lower basaltic layer, an upper rhyolitic layer and an episodically-present, thin middle layer of andesite. Variations in the chemistry of the Iwodake and Showa-Iwojima mafic inclusions suggest that multiple injections of very similar basaltic magma have occurred since the growth of the Iwodake dome. More extensive textural disequilibrium shows that the Showa-Iwojima rhyolites formed through more extensive interaction with mafic magma. The mafic-felsic interaction is consistent with degassing model of a magma chamber estimated by other researchers, which consists of degassing of upper rhyolitic magma by convection in a conduit and supply of a CO2-rich volatile phase from underlying basaltic magma to the rhyolitic magma.


Magma Chamber Basaltic Magma Plagioclase Phenocryst Rhyolitic Magma Clinopyroxene Phenocryst 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. Bacon, C. R., Magmatic inclusions in silicic and intermediate volcanic rocks, J. Geophys. Res., 91, 6091–6112, 1986.CrossRefGoogle Scholar
  2. Bacon, C. R. and J. Metz, Magmatic inclusions in rhyolites, contaminated basalts, and compositional zonation beneath the Coso volcanic field, California, Contrib. Mineral. Petrol., 85, 346–365, 1984.CrossRefGoogle Scholar
  3. Blake, S. and G. N. Ivey, Magma-mixing and the dynamics of withdrawal from stratified reservoirs, J. Volcanol. Geotherm. Res., 27, 153–178, 1986.CrossRefGoogle Scholar
  4. Chakraborty, S., J. R. Farver, R. A. Yund, and D. C. Rubie, Mg tracer diffusion in synthetic forsterite and San Carlos Olivine as a function of P, T and fO2, Phys. Chem. Minerals, 21, 489–500, 1994.CrossRefGoogle Scholar
  5. Clynne, M. A., A complex magma mixing origin for rocks erupted in 1915, Lassen Peak, California, J. Petrol., 40, 105–132, 1999.CrossRefGoogle Scholar
  6. Eichelberger, J. C., Origin of andesite and dacite: Evidence of mixing at Glass Mountain in California and at other circum-Pacific volcanoes, Geol. Soc. Amer. Bull., 86, 1381–1391, 1975.CrossRefGoogle Scholar
  7. Eichelberger, J. C., Vesiculation of mafic magma during replenishment of silicic magma reservoirs, Nature, 288, 446–450, 1980.CrossRefGoogle Scholar
  8. Feeley, T. C. and M. A. Dungan, Compositional and dynamic controls on mafic-silicic magma interactions at continental arc volcanoes: evidence from Cordon El Guadal, Tatara-San Pedro Complex, Chile, J. Petrol., 37, 1547–1577, 1996.CrossRefGoogle Scholar
  9. Gerlach, T. M., H. R. Westrich, and R. B. Symonds, Pre-eruption vapor in magma of the climatic Mount Pinatubo eruption: source of the giant stratospheric sulfur dioxide cloud, in Fire and Mud: Eruptions and Lahars of Mount Pinatubo, Philippines, edited by C. G. Newhall and R. S. Punongbayan, pp. 415–433, Univ. Washington Press, 1996.Google Scholar
  10. Goff, F. and G. M. McMurtry, Tritium and stable isotopes of magmatic waters, J. Volcanol. Geotherm. Res., 97, 347–396, 2000.CrossRefGoogle Scholar
  11. Goff, F., G. M. McMurtry, J. A. Stimac, and A. I. Adams, Stable isotopes and tritium of magmatic water at Satsuma-Iwojima volcano, Japan, EOS trans, American Geophys. Union. 1994 Fall meeting.Google Scholar
  12. Hattori, K., High-sulfur magma, a product of fluid discharge from underlying mafic magma: Evidence from Mount Pinatubo, Philippines, Geology, 21, 1083–1086, 1993.CrossRefGoogle Scholar
  13. Hedenquist, J. W., M. Aoki, and H. Shinohara, Flux of volatiles and ore-forming metals from the magmatic-hydrothermal system of Satsuma-Iwojima volcano, Geology, 22, 585–588, 1994.CrossRefGoogle Scholar
  14. Heiken, G. and J. C. Eichelberger, Eruptions at Chaos Crags, Lassen Volcanic National Park, California, J. Volcanol. Geotherm. Res., 7, 443–481, 1980.CrossRefGoogle Scholar
  15. Imai, N., S. Terashima, S. Itoh, and A. Ando, 1994 complication values for GSJ reference samples, “Igneous rock series”, Geochem. J., 29, 91–95, 1995.CrossRefGoogle Scholar
  16. Jarosewich, E., J. A. Nelen, and J. A. Norberg, Reference samples for electron microprobe analysis, Geostandards Newsletter, 4, 43–47, 1980.CrossRefGoogle Scholar
  17. Jarosewich, E., R. Gooley, and J. Husler, Chromium augite—A new microprobe reference sample, Geostandards Newsletter, 11, 197–198, 1987.CrossRefGoogle Scholar
  18. Kamada, M., Volcanoes and geothermy of Satsuma-Iwojima, Kagoshima prefecture, J. Japan Geothermal Energy Assoc., 3, 1–23, 1964 (in Japanese).Google Scholar
  19. Kawanabe, Y. and G. Saito, Volcanic activity of the Satsuma-Iwojima area during the past 6500 years, Earth Planets Space, 54, this issue, 295–301, 2002.CrossRefGoogle Scholar
  20. Kazahaya, K., H. Shinohara, and G. Saito, Degassing process of Satsuma-Iwojima volcano, Japan: Supply of volatile components from a deep magma chamber, Earth Planets Space, 54, this issue, 327–335, 2002.CrossRefGoogle Scholar
  21. Kitagawa, H., H. Fukuzawa, T. Nakamura, M. Okamura, K. Takemura, A. Hayashida, and Y. Yasuda, AMS 14C dating of varved sediments from Lake Suigetsu, central Japan and atmospheric 14C change during the late Pleistocene, Radiocarbon, 37, 371–378, 1995.Google Scholar
  22. Kouchi, A. and I. Sunagawa, A model for mixing basaltic and dacitic magmas as deduced from experimental data, Contrib. Mineral. Petrol., 89, 17–23, 1985.CrossRefGoogle Scholar
  23. Kouchi, A., A. Tsuchiyama, and I. Sunagawa, Effect of stirring on crystallization kinetics of basalt: texture and element partitioning, Contrib. Mineral. Petrol., 93, 429–438, 1986.CrossRefGoogle Scholar
  24. Koyaguchi, T., Evidences for two-stage mixing in magmatic inclusions and rhyolitic lava comes in Niijima island, Japan, J. Volcanol. Geotherm. Res., 29, 71–98, 1986a.CrossRefGoogle Scholar
  25. Koyaguchi, T., Textural and compositional evidence for magma mixing and its mechanism, Abu volcano group, Southwestern Japan, Contrib. Mineral. Petrol., 93, 33–45, 1986b.CrossRefGoogle Scholar
  26. Larocque, A. C. L., J. A. Stimac, J. D. Keith, and M. A. E. Huminicki, Evidence for open-system behavior in immiscible Fe-S-O liquids in silicate magmas: Implications for contributions of metals and sulfur to ore-forming fluids, Canadian Mineralogist, 38, 1233–1249, 2000.CrossRefGoogle Scholar
  27. Lindsley, D. H., Pyroxene thermometry, Amer. Mineral., 68, 477–493, 1983.Google Scholar
  28. Linneman, S. R. and J. D. Myers, Magmatic inclusions in the Holocene rhyolites of Newberry volcano, central Oregon, J. Geophys. Res., 95(B11), 17677–17691, 1990.CrossRefGoogle Scholar
  29. Machida, H. and F. Arai, Akahoya ash-a Holocene widespread tephra erupted from the Kikai caldera, south Kyushu, Japan, The Quaternary Res., 17, 143–163, 1978 (in Japanese with English abstract).CrossRefGoogle Scholar
  30. Notsu, K., K. Ono, and T. Soya, Strontium isotopic relations of bimodal volcanic rocks at Kikai volcano in the Ryukyu arc, Japan, Geology, 15, 345–348, 1987.CrossRefGoogle Scholar
  31. Ono, K., Long-term forecast of volcanic eruptions, Bull. Volcanol. Soc. Japan., 34, S201–S214, 1990 (in Japanese).Google Scholar
  32. Ono, K., T. Soya, and T. Hosono, Geology of Satsuma-Io-jima district. Quadrangle Series, Scale 1:50,000, Geol. Surv. Japan, 80 p., 1982 (in Japanese with English abstract).Google Scholar
  33. Pallister, J. S., R. P. Hoblitt, G. P. Meeker, R. J. Knight, and D. F. Siems, Magma mixing at Mount Pinatubo: Petrographic and chemical evidence from the 1991 deposits, in Fire and Mud: Eruptions and Lahars of Mount Pinatubo, Philippines, edited by C. G. Newhall and R. S. Punong-bayan, pp. 687–731, Univ. Washington Press, 1996.Google Scholar
  34. Persikov, E. S., The viscosity of magmatic liquids: experiment, generalized patterns, a model for calculation, applications, in Physical Chemistry of Magmas, edited by L. L. Perchuk and I. Kushiro, pp. 1–40, Springer-Verlag, 1990.Google Scholar
  35. Saito, G., K. Kazahaya, H. Shinohara, J. A. Stimac, and Y. Kawanabe, Variation of volatile concentration in a magma system of Satsuma-Iwojima volcano deduced from melt inclusion analyses, J. Volcanol. Geotherm. Res., 108, 11–31, 2001.CrossRefGoogle Scholar
  36. Sakuyama, M., Evidence of magma mixing: Petrological study of Shirouma-Oike calc-alkaline andesite volcano, Japan, J. Volcanol. Geotherm. Res., 5, 179–208, 1979.CrossRefGoogle Scholar
  37. Shaw, H. R., Links between magma-tectonic rate balances, plutonism and volcanism, J. Geophys. Res., 90, 11275–11288, 1985.CrossRefGoogle Scholar
  38. Shinohara, H., W. F. Giggenbach, K. Kazahaya, and J. W. Hedenquist, Geochemistry of volcanic gases and hot springs of Satsuma-Iwojima, Japan: Following Matsuo, Geochem. J., 27, 271–285, 1993.CrossRefGoogle Scholar
  39. Shinohara, H., K. Kazahaya, G. Saito, N. Matsushima, and Y. Kawanabe, Degassing activity from Iwodake rhyolitic cone, Satsuma-Iwojima volcano, Japan: Formation of a new degassing vent, 1990–1999, Earth Planets Space, 54, this issue, 175–185, 2002.CrossRefGoogle Scholar
  40. Sparks, R. S. J. and L. A. Marshall, Thermal and mechanical constraints on mixing between mafic and silicic magmas, J. Volcanol. Geotherm. Res., 29, 99–124, 1986.CrossRefGoogle Scholar
  41. Stimac, J. A. and T. H. Pearce, Textural evidence of mafic-felsic magma interaction in dacite lavas, Clear Lake, California, Amer. Mineral., 77, 795–809, 1992.Google Scholar
  42. Stimac, J. A., T. H. Pearce, J. M. Donnelly-Nolan, and B. Carter Hearn, Jr., The origin and implications of undercooled andesitic inclusions in rhyolites, Clear Lake Volcanoes, California, J. Geophys. Res., 95, 17729–17746, 1990.CrossRefGoogle Scholar
  43. Takamiya, H. and S. Nishimura, Thermoluminescence ages of some volcaniclastic materials, Nucl. Tracks Radiat. Meas., 11, 251–257, 1986.CrossRefGoogle Scholar
  44. Tepley, F. J., III, J. P. Davidson, and M. A. Clynne, Magmatic interactions as recorded in plagioclase phenocrysts of Chaos Crags, Lassen Volcanic Center, California, J. Petrol., 40, 787–806, 1999.CrossRefGoogle Scholar
  45. Thomas, N., S. Tait, and T. Koyaguchi, Mixing of stratified liquids by the motion of gas bubbles: application to magma mixing, Earth Planet. Sci. Lett., 115, 161–175, 1993.CrossRefGoogle Scholar
  46. Togashi, S. and S. Terashima, The behavior of gold in unaltered island arc tholeiitic rocks from Izu-Oshima, Fuji, and Osoreyama volcanic areas, Japan, Geochim. Cosmochim. Acta, 61, 543–554, 1997.CrossRefGoogle Scholar
  47. Tomiya, A. and E. Takahashi, Reconstruction of an evolving magma chamber beneath Usu volcano since the 1663 eruption, J. Petrol., 36, 617–636, 1995.CrossRefGoogle Scholar
  48. Tsuchiyama, A., Crystallization kinetics in the system CaMgSi2O6-CaAl2Si2O8: development of zoning and kinetics effects on element partitioning, Amer. Mineral., 70, 474–486, 1985a.Google Scholar
  49. Tsuchiyama, A., Dissolution kinetics of plagioclase in the melt of the system diopside-albite-anorthite, and origin of dusty plagioclase in andesites, Contrib. Mineral. Petrol., 89, 1–16, 1985b.CrossRefGoogle Scholar
  50. Ueda, A. and T. Itaya, Microphenocrystic pyrrhotite from dacite rocks of Satsuma-Iwojima, Southwest Kyushu, Japan and the solubility of sulfur in dacite magma, Contrib. Mineral. Petrol., 78, 21–26, 1981.CrossRefGoogle Scholar
  51. Ujike, O., T. Soya, and K. Ono, Majorelement, Rb, Sr, Y and Zr composition and origin of volcanic rocks from the Kikai Caldera, south of Kyushu. J. Japan. Assoc. Mineral. Petrol. Econ. Geol., 81, 105–115, 1986 (in Japanese with English abstract).CrossRefGoogle Scholar
  52. Wallace, P. J. and T. M. Gerlach, Magmatic vapor source for sulfur dioxide released during volcanic eruptions: Evidence from Mount Pinatubo, Science, 265, 497–499, 1994.CrossRefGoogle Scholar

Copyright information

© The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences. 2002

Authors and Affiliations

  • Genji Saito
    • 1
  • James A. Stimac
    • 2
  • Yoshihisa Kawanabe
    • 1
  • Fraser Goff
    • 3
  1. 1.Geological Survey of JapanAISTTsukuba, IbarakiJapan
  2. 2.Philippine Geothermal, Inc.Makati
  3. 3.EES-6, MS-D462Los Alamos National LaboratoryLos AlamosUSA

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